[MLIR][TORCH] Handle unused variable in InlineGlobalSlots Pass (#4261)

Add tag `[[maybe_unused]] ` to avoid compiler error/warning for unused
variable in InlineGlobalSlots Pass.

---------

Authored-by: Vivek Agrawal <[email protected]>

Author: amd-vivekag

lib/Dialect/Torch/Transforms/InlineGlobalSlots.cpp

@@ -251,7 +251,8 @@ bool InlineGlobalSlotsAnalysis::isValueSafeTransferFunction(Value value) {
 
 SmallVector<Operation *> getBackwardSliceIncludingRoot(Value initialValue) {
   SetVector<Operation *> sliceSet;
-  LogicalResult result = getBackwardSlice(initialValue, &sliceSet);
+  [[maybe_unused]] LogicalResult result =
+      getBackwardSlice(initialValue, &sliceSet);
   assert(result.succeeded() && "expected a backward slice");
   SmallVector<Operation *> slice;
   llvm::append_range(slice, sliceSet);